How Do I Check If Port 25 Is Open?
How Do I Check If Port 25 Is Open? Open the Start menu. Select Run. Type cmd. Press Enter. Type telnet MAILSERVER 25 (replace MAILSERVER with your mail server (SMTP) which may be something like server.domain.com or mail.yourdomain.com). Press Enter. How check if port is open Linux? Open a terminal application i.e. shell prompt. Run